SIMULATION -
Please open the ip_forward, and take effect permanently.
SIMULATION -
Please open the ip_forward, and take effect permanently.
To make IP forwarding effective permanently, you need to edit the sysctl configuration file and then reload the configuration. The following steps ensures that the change survives a reboot: 1. Open the sysctl configuration file with a text editor, for example, by using the command 'vi /etc/sysctl.conf'. 2. Add the line 'net.ipv4.ip_forward = 1' to the file. 3. Save and close the file. 4. Apply the changes immediately by running the command 'sysctl -p'. We do this to ensure the change is effective right away and will also be applied on reboot.
There is no option -P in RHEL8. You need to use the -w option followed by the argument sysctl -w net.ipv4.ip_forward=1 NOTE: No space before or after "=" sign.
Would this survive reboot? Remember exam needs all changes that survives reboot.
No, This will echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf sysctl -p
you can view the system default line by "sysctl -a | grep ip_forward". "net.ipv4.ip_forward = 0" by system already has 'space' before/after '='. hence it is fine to have 'space'.
[root@station ~]# sysctl -a | grep net.ipv4.ip_forward net.ipv4.ip_forward = 0 net.ipv4.ip_forward_update_priority = 1 net.ipv4.ip_forward_use_pmtu = 0 [root@station ~]# sysctl -w net.ipv4.ip_forward=1 net.ipv4.ip_forward = 1 [root@station ~]# sysctl -a | grep net.ipv4.ip_forward net.ipv4.ip_forward = 1 net.ipv4.ip_forward_update_priority = 1 net.ipv4.ip_forward_use_pmtu = 0 [root@station ~]#
sysctl -w command cannot survive a reboot. hence others are suggesting to write a line into sysctl.conf. and followed by sysctl -p
echo net.ipv4.ip_forward=1 >> /etc/sysctl.conf sysctl -p
# grep ip_forward /etc/sysctl.d/* /etc/sysctl.d/60-gce-network-security.conf:net.ipv4.ip_forward=0 # vi /etc/sysctl.d/60-gce-network-security.conf net.ipv4.ip_forward=0 # sysctl -w net.ipv4.ip_forward=1
vi /etc/sysctl.conf net.ipv4.ip_forward = 1
echo "net.ipv4.ip_forward = 1" > /etc/sysctl.d/ipforward.conf systemctl reboot
echo " net.ipv4.ip_forward = 1" >> /etc/sysctl.conf